semi-differentiated and integrated graphically with MathHand.com
some functions cannot be differentiated or integrated symbolically, but can be semi-differentiated and integrated graphically in plot2D. e.g.
integrate2D numerically and graphically integrate a function on graph. it convert the integrate( ) to the integrates(x=>sin(x)) for integral graph.
http://drhuang.com/science/mathematics/software/help/example/#plot2d